Also, keep anything and everything he sends you, and document it. Just in case. (I appologize if this has been said already and I happened to miss it)
WITHOUT DELAY – Have your family members block him too! In my opinion, the stalking has begun. I am sure he is going to try to gather all the information about you that he can.
Sorry Pollyanna, but this guy’s a nutbar with a capital NUT. There’s hurt and there’s crazy weirdoness, and this guy’s pretty clearly in the latter rather than the former.
I beg your pardon. My NUT has always been in lower case. 
They should have finished the job.
Don’t do this. You’ll just be giving him an in to respond to “it was just a kiss” with whatever stupid horseshit significance he’s cooked up over the last decade and a half of stewing- even if you blocked him, it’d only encourage him to find other ways to contact you. Don’t listen to this person. Listen to everyone else in the thread.
Win!
/hijack You’re in Tragic City? I’ve spent far too much time there!
Absolutely yes, the “ETA” was meant to say exactly that.
Have everyone who is a friend of your on FB block him, too. Otherwise, he can keep tabs on you by looking at their pages.
Keep copies of all the messages. Do not respond in any way.
This guy isn’t a weirdo. He’s dangerously out of touch with normal social expectations, and therefore unpredictable in what he’ll do next. He could, of course, just go away, but I would bet on at least a few attempts to contact you through other channels before he does so.
How? When you block someone on Facebook, you become invisible to them. I’m not aware of any way for a blocked person to see interactions between you and your mutual friends.
I’m not that worried about it, anyway–we have two mutual Facebook friends, and I never interact with either of them.
I believe once you message someone, they have access to your page for 30 days. Hopefully that is negated by blocking him, but during that time until you did, he could access everything you had open for viewing.
Nope. Not sure where you heard this.
In Poysyn’s defense, I believe that used to be true, but it hasn’t been for quite some time.
Might be some confusion with friend requests, which do (or at least used to) give the person you requested access to your Wall. Blocking does indeed sever all connections, though: “Once you block someone, that person can no longer be your friend on Facebook or interact with you (except within applications and games you both use).”
Oh, and PeskiPiksi, sounds to me like you reacted kindly to an odd situation, and did the best you could with it.
Certainly wouldn’t be the first time I had the wrong information, thanks for clarifying.
I hope the OP hears nothing else from the weirdo.
Damn, girl! All I can say is you must be one helluva kisser.
I’ve dealt with more than my share of crazy people and still do (Thailand attracts them like flies). Now that you’ve apologized an offered and explanation and he’s still acting so creepy, attempts at blocking any contact are the right way to go. The stalking bit is scary; I may have missed it in the thread, but I hope he’s still not living in your area. If by some chance he evades all attempts to cut off contact and manages to speak or write to you, then that will be the time to tell him honestly that his behavior is completely inappropriate and you want nothing to do with him; and then you might want to mention it to the police, because your words will not have registered on him if my experience is anything to go by.
As for “hooking up,” back in my day it just meant any kind of relationship, sexual or otherwise. You could “hook up” with someone downtown and go out for a drink. Or a quickie. Or a pizza. Guess it’s evolved.
AFAIK, it still has that meeting. “Let’s hook up for a beer” is still common usage, unless I really have crested comfortably into middle age. But when you talk about a “drunken hook-up”, to me that’s always been sexual.
You know it! 
Seriously, though…I have a feeling that in his mind I’m still that skinny, attractive, shy-but-friendly nineteen year-old. I think maybe if he came face to face with the middle-age, overweight (gotta be honest) woman I’ve become (who barely has time to brush her teeth some days and usually has a baby on one arm and a toddler clutching after)…well…lets just say he might not be so enthusiastic to rekindle the past!
Thanks everyone for all the advice in the thread. So far all’s been quiet, but my little girl’s been sick so I’ve barely left the house. Next time I go out I’ll make sure to watch for cars following behind!
Several years ago I bought my first home. A 10yrs younger friend was visiting, checking out the new situation.
When he saw that I now owned my own washer-and-dryer, his exact words were “dude. You got the hookup!”
~goes back to having cheap, emotionally-unattached-and-uninvolved sex with the washer-and-dryer~